19729925 divided by 390 
We're looking to find how many times 390 goes into 19729925.

Moving on to step 1:
When dividing 1 by 390, we get 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 390

Going ahead to step 2:
19 divided by 390 is 0 with a remainder of 19.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 19 to get 19.
Grab the next digit (7) from the dividend, add it to 19, then carry on: 197 / 390

Advancing to step 3:
If we divide 197 by 390, we get 0 and a remainder of 197.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 197 and we're left with 197.
Include the next digit (2) from the dividend after 197, then repeat: 1972 / 390

Step 4:
If we divide 1972 by 390, we get 5 and a remainder of 22.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Subtracting 1950 from 1972 leaves us with 22.
Grab the next digit (9) from the dividend, add it to 22, then carry on: 229 / 390

Let's proceed to step 5:
If we divide 229 by 390, we get 0 and a remainder of 229.
Write down 0 as next digit of the result. 
Result so far: 50.0
If we take 0 away from 229, we end up with 229.
Append the next digit (9) from the dividend to 229 and continue with: 2299 / 390

Going ahead to step 6:
If we divide 2299 by 390, we get 5 and a remainder of 349.
The number 5 becomes the next digit in our result. 
Result so far: 505.0
If we take 1950 away from 2299, we end up with 349.
Bring next digit (2) of the dividend behind the 349 and repeat the process: 3492 / 390

Advancing to step 7:
390 goes into 3492 8 times with a remainder of 372.
Record the quotient 8 as the next digit in the result. 
Result so far: 5058.0
Subtracting 3120 from 3492 leaves us with 372.
Append the next digit (5) from the dividend to 372 and continue with: 3725 / 390

On to step 8:
The number 390 fits into 3725 9 times, leaving a remainder of 215.
The number 9 becomes the next digit in our result. 
Result so far: 50589.0
If we take 3510 away from 3725, we end up with 215.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

Advancing to step 9:
390 can be fit into 2150 5 times, resulting in a remainder of 200.
Put 5 as the next digit of the answer. 
Result so far: 50589.5
Subtract 1950 from 2150 to get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Advancing to step 10:
When dividing 2000 by 390, we get 5 with a remainder of 50.
The next digit of our result is 5. 
Result so far: 50589.55
Subtracting 1950 from 2000 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

The final outcome is 50589.55, with a leftover of 0.05.